题目内容
_________ I could think of an answer, the teacher asked someone else.
| A．Because | B．As |
| C．Before | D．After |
C
解析试题分析：Because因为；As随着，作为，由于；Before在……之前；After在……之后。句意：还没有等到我想出答案，老师已经提问别人了。结合语境可知选C。
考点：考查连词辨析
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